Enum LogicalDataType 

pub enum LogicalDataType {
    Bool,
    Int32,
    Int64,
    Float32,
    Float64,
    Binary,
    FixedBinary {
        byte_width: i32,
    },
    Utf8,
    Int96,
    Timestamp {
        unit: LogicalTimestampUnit,
        timezone: Option<String>,
    },
    Decimal {
        precision: i32,
        scale: i32,
    },
    Struct {
        fields: Vec<LogicalField>,
    },
    List {
        elements: Box<LogicalField>,
    },
    Map {
        key: Box<LogicalField>,
        value: Option<Box<LogicalField>>,
        keys_sorted: bool,
    },
    Other(String),
}

Logical data types that can be stored in the table schema metadata.

Variants

Bool

Boolean value.

Int32

32-bit signed integer.

Int64

64-bit signed integer.

Float32

32-bit floating point.

Float64

64-bit floating point.

Binary

Variable-length binary data.

FixedBinary

Fixed-length binary data.

Fields

byte_width: i32

Fixed byte width for each value (in bytes).

Utf8

UTF-8 encoded string.

Int96

Legacy 96-bit integer (primarily for Parquet compatibility).

Timestamp

Timestamp value with a precision unit and optional timezone.

Fields

unit: LogicalTimestampUnit

Timestamp precision unit (millis, micros, nanos).

timezone: Option<String>

Optional IANA timezone identifier.

Decimal

Fixed-precision decimal value with declared precision and scale.

Fields

precision: i32

Total number of decimal digits (both sides of the decimal point).

scale: i32

Number of digits to the right of the decimal point.

Struct

Struct with named child fields.

Fields

fields: Vec<LogicalField>

Ordered set of child fields for the struct.

List

List (array) with a single element field definition.

Fields

elements: Box<LogicalField>

Element field definition for list items.

Map

Map with key/value field definitions. If value is None, this represents Parquet MAP “keys-only” semantics (set of keys).

Fields

key: Box<LogicalField>

Key field definition (must be non-nullable for Arrow compatibility).

value: Option<Box<LogicalField>>

Value field definition.

keys_sorted: bool

Whether entries are sorted by key.

Other(String)

Catch-all logical data type referenced by name.

Trait Implementations

impl Clone for LogicalDataType

fn clone(&self) -> LogicalDataType

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LogicalDataType

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LogicalDataType

fn deserialize<__D>( __deserializer: __D, ) -> Result<LogicalDataType, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for LogicalDataType

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl PartialEq for LogicalDataType

fn eq(&self, other: &LogicalDataType) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for LogicalDataType

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for LogicalDataType

impl StructuralPartialEq for LogicalDataType